Definitions for metmyoglobin
met·myo·globin

WiktionaryRate this definition:0.0 / 0 votes

1. metmyoglobinnoun

   The oxidized form of myoglobin

WikipediaRate this definition:0.0 / 0 votes

1. Metmyoglobin

   Metmyoglobin is the oxidized form of the oxygen-carrying hemeprotein myoglobin. Metmyoglobin is the cause of the characteristic brown colouration of meat that occurs as it ages. In living muscle, the concentration of metmyoglobin is vanishingly small, due to the presence of the enzyme metmyoglobin reductase, which, in the presence of the cofactor NADH and the coenzyme cytochrome b4 converts the Fe3+ in the heme prosthetic group of metmyoglobin back to the Fe2+ of normal myoglobin. In meat, which is dead muscle, the normal processes of removing metmyoglobin are prevented from effecting this repair, or alternatively the rate of metmyoglobin formation exceeds their capacity, so that there is a net accumulation of metmyoglobin as the meat ages. Metmyoglobin reduction helps limit the oxidation of myoglobin and the oxidation of myoglobin is specific to each species. In other words, metmyoglobin gains electrons in order to limit myoglobin from losing electrons. Metmyoglobin after being oxidized by myoglobin shows the undesirable brown color which can be seen in many types of meat. Metmyoglobin is more susceptible to oxidation when being compared to oxymyoglobin. The metmyoglobin reducing activity varies across species and was studied particularly in beef, porcine, bison, deer, emu, equine, goats and sheep. Currently there is not a standard technique in measuring the metmyoglobin in all species. But many techniques are used including reflectance spectrophotometry and absorbance spectrophotometry are used.

WikidataRate this definition:0.0 / 0 votes

1. Metmyoglobin

   Metmyoglobin is the oxidised form of the oxygen-carrying protein myoglobin. Metmyoglobin is the cause of the characteristic brown colouration of meat that occurs as it ages. In living muscle, the concentration of metmyoglobin is vanishingly small, due to the presence of the enzyme metmyoglobin reductase, which, in the presence of the cofactor NADH and the coenzyme cytochrome b4 converts the Fe3+ in the heme prosthetic group of metmyoglobin back to the Fe2+ of normal myoglobin. In meat, which is dead muscle, the normal processes of removing metmyoglobin are prevented from effecting this repair, or alternatively the rate of metmyoglobin formation exceeds their capacity, so that there is a net accumulation of metmyoglobin as the meat ages.

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Metmyoglobin

   Myoglobin which is in the oxidized ferric or hemin form. The oxidation causes a change in color from red to brown.

How to pronounce metmyoglobin?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say metmyoglobin in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of metmyoglobin in Chaldean Numerology is: 1

2. Pythagorean Numerology

   The numerical value of metmyoglobin in Pythagorean Numerology is: 6

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Metmyoglobin
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Metmyoglobin
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=metmyoglobin